18428332 has 12 divisors (see below), whose sum is σ = 34730416. Its totient is φ = 8505360.

The previous prime is 18428327. The next prime is 18428341. The reversal of 18428332 is 23382481.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18428294 and 18428303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177144 + ... + 177247.

Almost surely, 2^18428332 is an apocalyptic number.

It is an amenable number.

18428332 is a deficient number, since it is larger than the sum of its proper divisors (16302084).

18428332 is a wasteful number, since it uses less digits than its factorization.

18428332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354408 (or 354406 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 18428332 is about 4292.8233133918. The cubic root of 18428332 is about 264.1366563690.

The spelling of 18428332 in words is "eighteen million, four hundred twenty-eight thousand, three hundred thirty-two".